On 05/22/2017 10:24 PM, Eric Blake wrote:
> On 05/19/2017 04:34 AM, Anton Nefedov wrote:
>> If COW area of the newly allocated cluster is zeroes, there is no reason
>> to write zero sectors in perform_cow() again now as whole clusters are
>> zeroed out in single chunks by handle_alloc_space().
>
On 05/22/2017 10:24 PM, Eric Blake wrote:
On 05/19/2017 04:34 AM, Anton Nefedov wrote:
If COW area of the newly allocated cluster is zeroes, there is no reason
to write zero sectors in perform_cow() again now as whole clusters are
zeroed out in single chunks by handle_alloc_space().
But
On 05/19/2017 04:34 AM, Anton Nefedov wrote:
> If COW area of the newly allocated cluster is zeroes, there is no reason
> to write zero sectors in perform_cow() again now as whole clusters are
> zeroed out in single chunks by handle_alloc_space().
But that's only true if you can guarantee that
If COW area of the newly allocated cluster is zeroes, there is no reason
to write zero sectors in perform_cow() again now as whole clusters are
zeroed out in single chunks by handle_alloc_space().
Introduce QCowL2Meta field "reduced", since the existing fields
(offset and nb_bytes) still has to
